Welding machine



Nov. 20, 1923. 1,474,824

0. L. HOFF ET AL WELDTNG MACHI NE Filed March 1. 1921 7 Sheets-Sheet 1 QQ gamma Nov. 20 1923.

V C. L. HOFF ET AL WELDI NG MACHI N E Filed March 1. 1921 '7Sheets-Sheet 2 Nov. 20 1923. 1,474,824

c. L. HOFF ET AL WELDING MACHINE Filed March 1. 1921 7 Sheets-Sheet 5QMSLG-ML-H ammo Nov. 20 1923. 1,474,824 C. L. HOFF ET AL WELDI NG MACHINE Filed March 1. 1921 '7 Sheets-Sheet 5 N h 0) U) Q o o v o 0 Oil N [ia I u 3 "1 H 7 O' m Q g J W Q f Nov. 20 1923.

C. L. HOFF ET AL WELDING MACHINE Filed March 1,

'7 Sheets-Sheet 6 Nov. 20 1923. 1,474,824

c. L HOFF ET AL WELDTNG MACHINE Filed March 1, 1921 7 Sheets-Sheet 7 Mmcmmmm'r a ve/WW E 513 Gum/14% all) Patented Nov. 20, 1923.

UNITED STATES PATENT OFFICE.

CARLTON L. near him emnnus e. naoenn, or Yon-x, PENNSYLVANIA, sssronons'ro AMERICAN cna m comrannmu, A CORPORATION on NEW YORK.

WELDING MACHINE.

Application filed mm 1, 1921. SerialRo. 449,761.

To all whom itmay come-m:

Be it known that we, CARLTON L. Horn and Gmannos G. Nsnonn, bothcitizens of the United States, and both residing at York, Pennsylvania,have invented certain new and useful Improvements in Welding Machines,of which the following, taken in connection with the accompanyingdrawings, is a specification.

Our invention relates mainly to electric welding machines of the typeadapted primarily for welding formed unwelded chain, although as willappear from the description it may be useful in conjunction withmachines for welding other kinds of .work.

One object of our invention is to provide a machine whereby the linksofa formed but unwelded chain may be welded succes sively. :"1

A further object is to provide electrodes with actuating mechanism suchthat the electrodes may be advanced sufficiently independently of eachother'to accommodate them selves to irregularities in the dimensions ofthe stock of the links and to variation of the two free ends ofa linkfrom. true alinement with each other. I E- 1 A further objecti is to"rovide' animproved construction of welding and s'wagm'g or forgingmechanism for removing or re dncing the bur -formed at'the' weld.

A further object is to provide animproved construction of welding andswaging or forging mechanism, the operation of which willbecharacterized by a pulsating or hammering action. f

A further object is to provide an improved welding and swaging mechanismsuch that the hammering action is supplemented'by such motion relativeto the ink that the blows are distributed to various parts of the weld.I

A further'object is: to provide achain feed mechanism adapted'to presenteach link of a chain successively-in position to be operated upon.

A further object is to feed mechanism whereby t e links are suecessively presented in uniform position for the welding operation.

A further object is to provide a means for securely retaining thesuccessive links uniformly in the same position.

Anotherpbject is to provide 'aswagingmechanism such that theswaging'tools will ]provide a chain just-able. insulated clamp have anoscillating or rocking motion with respect to the link, the latter, ifdesired, remaining stationary during the swaging.

Another object is to provide a machine for welding formed chainautomatically if desired.

Referring to the drawings:

Figure 1 is a plan view of the machine.

Figure 2 is-a side view in elevation.

Figure 3 is a front elevation.

Figure 4 is an elevation partly in section on the line 4-4 of Figure 1.

Figure 5 is an elevation of the left hand chain lifting mechanism.

Figure 6 1s a detail sectional elevation on .the line 66 of- Figure 1,looking in the direction of the arrows, showing the right hand chainlifting mechanism.

Figure. 7 is a detail side elevation of the swaging bur trimming andreducing mechanism.

Figure 8' is a detail enlarged view, partly in section, on the line 8--8of Figure 7.

Figure 9 is a detail view of one of the dies: carried by the burtrimming'and removing mechanism.

Figure 10 is a detached view, partly in section, showing the burtrimming and reducing mechanism with the parts positioned at. one oftheextreme limits of oscillation. Figure 11 is a plan view partly broke-nof the swaging bur trimming and reducing mechanism, the -mechanism foroscillating the bur trimming and reducingdies' being omitted.

Figure 12 is an enlarged side elevation of the mechanism for operatingthe movable clamp jaws.

Figure 13 is a front sectional elevation on the line 13-13 of Figure 12.

Figure 1. is an enlarged detail plan view of the link-holding clamp andelectrodes.

Figure 15 is aplan view of certain parts showing a modification in whichthe'movement of the electrodes is hand controlled.

= The machine includes the usual. bed 1011 which the operating parts aremounted and the bedmey be an portediby the usual. standards 2. Suitab emeans are provided for firmly securing a link while the severaloperations hereinafter to be 'described are performed upon it. Thismeans may consist ofa clamp comprising a stationary adaw 3 and aninsulated movable clamp 1am. 4,the stationary llu clamp 'aw 3 beingprovided with a, pair of upston in studs 5, 5 recessed to fit the curvedend of a link, and the movable'clnmp jaw i being provided with a pair ofsimilar studs, 6, 6 similarly but oppositely recessed, the two pairs ofstuds being oppositely disposed with respect to each other, whereby a.link may be firmly held by them when the movable clump jaw is brought togi en proximity to the stationary clamp jaw. The movable clampjaw isslidahly mounted in an insulated guidewny 7 whereby it may be movedtoward and away hom the stationary jaw by the motion of the clamp jawlever 8. The clamp jaw lever 8 is pivoted at 9 in the bearing 10, andone end of this lever,

namely that which aotuntes the movable clamp jaw is preferabl providedwith an adjustment screw 11 w eneby the limit of motion of the movableclamp jaw in the direction of the fixed clamp jaw may be minutely variedas adjustment may be required to correct errors or to uccomodato varioussizes of links or otherwise.

Adjustment of-grenter-magnitude may be effected by making the bearin 1Uhorizontaliy adjustable, which is suitably done bv mounting it on theserrated surface of a block 12, the bottom surface of the bearing beinglikewise serrated to correspond as shown in Fi ure 4, whereby thehearing may be moved ifilesired but is otherwise retained rigidly at anygiven position. The roller 13 on the end of the jaw lever S is inoperative contact-with the cam 14 mounted on the main shaft 15, and bythe revolution of the cam is oausedto osclllote in ahorizontal plane,whereby the movable clamp jaw is given it reciprocating motion c0-ordinnted with the motion of-the other parts, as will be hereinaftermore :fully described. Rearward motion-ofthe movable clamp jaw iseffected by the spring L6. connecting the jaw with the bed.

In the preferred embodiment of the innention as shown in theaccompanying drami ngs, a. machine is shown adapted to weld successivelyeach link of the type of chain in which alternate links are spliton thesome side of the chain, the split in each link being approximatelymidway between the ends, as shown in Figure 1.

At the moment of completion of all of the operations upon any iven linkthe chain is so positioned that the link lies norinnll between the clampjaws. Theretore, before the chain can be advanced :to pluce'the nextsucceeding link in position to be operated upomtheremust be a relativemovement as between the clamp and the chain whereby the latter-shall beunobstructed in its odvence. This result is prefeigablv accomplished byopening the clamp and moving the ch'ainnway fironi it. preferably in anupward direction.

The chain may be fed and its angular position with reference to its axiscontrolled by passing it in the direction of the arrow (Figure 1)through cruciform dies, located on either side of'thc clamp, The dies onone side of the jaws as indicated by the numerals 17, 17 and which willbe referred to as the left hand dies, are enclosed by a slee e 18 whichis rotatably supported by the bearino 19 which in turn is carried by theclot-"sting arm 20 pivotally connected with the bed at 21, the other endof the arm having operative contact with the cam 22. The com 2-2 isshaped and timed to raise and lower the bearin 19 and consequently thedies 1?, 17 and l he end of the section of chain carried by them inco-ordination with the motions of the other parts.

Similarly on the other side of the jaws are the cruciform-dies 23, 23,which may be referred to as the right hand dies and which are retainedby thesleev e 24 which in turn is rotatably mounted in the bearings 25,25 carried bylthe bifurcated arm 26. The opposite end of the arm 26 hascontact with the cam 27, whereby, as in the case oi the arm 21, thehen-rings25 and the end of the chain carried by them are raised andlowered in coordination with the movements of the other parts of themachine.

The motionofithe ri ht hand set of dies varies somewhat from t t of thelefi: hand set. Their upward of movement is preferablythe some, and froma osition in which the chain is approximately evel with the bed, theupward motions of both sets of dies are synchronous andcoterminous aslikewise their downward motions to this position. The position lostmentioned we term for comzemenm the send-donated position of thediesaltho 'itisiin fact-the lowest positiqnbfithe 1e hand When both sets.of dies hnewe reachedthe semirelevated position, however, the rightbot-nil digs continue downwardlynintil the'chojn en ages with the grabor feed hook 30. whereby it is advanced or fed by the auction of thelatter, as will be further described. The right hand dies are thenreturned to semielevated position ithe chain then being out ofengagement with the hook.

Any suitable mechanism may be employed for advancing the .chain the renired distmnce at the completion of one. cycle of operations. Forinstance, the carriage 28 slidably mounted in the lideway 29 may carr anupstanding fork which a verticm ydisposed dink of the chain may S idnblyfit and whereby the succeeding horizontally disposed link may be grippedand the chain drown .or advanced the required distance as the carriage28 moves in the uideway. As in the particular machine r-lustrated-thelinks aretobeoperoted upon in succession this distance is of courseequal carriage may penfp eral cam 34 mounted on the main sha t 15. Thesleeve 24 is provided with a longitudinal aperture 35 in the lowerportion of its periphery to permit travel of the hook withoutinterference, the aperture being-,sufliciently wide to permit the sleeveto rotate in an arc of 90 degrees. For varying the extent of: feed it isconvenient to make the lever 31 adjustable longitudinally of itself inits fulcrum,-which may be done by making it slotted as indicated at 36,and suspending it from the bracket 37 by means of the bolt 38, thebushing 39 and the nut 40 (Figure 6). 1

As the links to be operated upon are preferably resented in uniformosition, which position in the machine as s own is horizontal, meansareprovided for rotating the chain on its longitudinal axis prior to itsbeing seated in the clam an angular distance sufiicient to cause e linkto lie in ahorizontal osition whilethe necesso. operations are einperformed upon it. ince we have illnsti d a machine adapted to operatein a chain ofthe type in which the splits in alternate links areunifiormly positioned withrespect-to the chain'itself, the positioningof eachsucoeeding link requires only a quarter turn, that is; a turn of90 degrees. As above :desoribed, the cruciform dies are retained bysleeves which arerotatab 1y mounted in benri carried by arms 20'and 26wlru'are'by the c ain may be raised and lowered from the horizontalplane of the studs. The rotationof the-chain may take place at anvtimeIaiter-it has cleared the studs. To'efi ect' this, the sleeves areprovided with arms 41, 41 which-are pivotally connected at e2, 42to'links il, 43 which in turn are' pivotally connectedat 44', 4st tolevers 45, 45-piv tally connected at 26, 46 to the bed of the 'machinerThe proper motion to actuate the levers 45, 4:5 is imparted by the cams47, 47 mounted on the half-time shaft 48' which has o erative connectionwith the main shaft 15 011 h the gears 49 and 50, the eiul' 49 being ifesired located on the perip ery ofoue of the came 47. The cams 4 areshapedhnd timed to cause the cruciform dies to rotate the chain inopposite directions a quarter turn alternately during each successivecycle of operations.

To facilitate even motion of the chain 7 while being fed it isconvenient to guide it bed of t e machine.

into the dies by meansof a guide lip 51 supported b thebracket52"mounted on the The tension of the chain may be maintained by theplunger :33. carrying the bifurcated block 53, and it may be raised andlowered on the chainby the cam lever 54. The block is normallymaintained against sureof the sprin 55. The welded chain may bedischar dover the pulley 56 mounted on the hr et 57 which in turn is supported bthe bed of the machine.

As one 1 link is held by the clamp jaws and presented in position to beoperated upon, the electrodes 58, 58 are brought in contact with it, oneon each side of the split in the link, whereby a circuit through theabuttin ends is made. This may be accomplis ed in an convenient manner.The electrodes may e separately mounted in carriages 59, 59 slidablymounted in th bracket 60, whereby they may be evenly advanced andretracted as required. The mechanism for advancing and retracting theelectrodes may consist of a lever 61 pivotally mounted in the bracket62. One end of t 1e lever is connected to the two carriages through themedium of the equalizing link 53 (shown in dotted lines Figure 1)whereby a certain degree of independent motion is permitted theelectrodes to allow for variations in alinement of the two free ends ofthe link being operated upon or irre l-arities in the stock from whichthe chain is formed. The lever 61 is resiliently and pivot-allyconnected to the rod 64. The barrel 65 retains the sprin 66 which bearsagainst the block 67 slidab y mounted in the slot 68in the end of thelever 61. The block 67 is pivotally carried on the end of the rod 6*,havin at its opposite end the oke 69.

ivotally mounted on a bracket 70 on the bed is the pawl 71 eo-operatingwith the wi er cm [2 mounted on the main shaft an 'shapedanditimed toadvance the electrodes to close the circuit through the abutting ends ofthe link at the proper time. The pawl, which may have the enerul shapeof a hell crank lever, has universal connection with the yoke 69, and isnormally maintained against the wiper cam by a mum ression 5 ring 73seated against the bracket 44. Anot er spring 75 may also be seatedagainst the o posite side of the bracket 74 to take the re ound of therod 64 when the electrodes are retracted.

The circuit may be opened and closed at the proper times by any suitablemeans. For mstanceythe bell crank lever 7 6 pivotally mounted on theinsulated bracket 77 mounted on the bed is rovided with a roller 78 ofinsulating material in uni-operative relation with the peripheral cam 79provided with the depression 80. Another insulated bracket 81 is alsomounted on the bed and carries the contact point 82, which makesconnection with the contact point 83 carried by the end of the bellcrank lever 84. The

the chain by the pres- I transformer the connection is ISO pleted andwhile the goints are normally maintained in contact y a tension springconnecting the end of the bell crank lev r with the bracket 77. When theroller 78 is in the depression 80 the circuit is closed, this takingplace when the electrodes are in advanced position. Suitable terminols86, 86 are also provided who y the proper connection with. ,the make andbreak mechanism may he made. Connection from these terminals may, ifnecessmmhe made with o. stepdowntruns former containing the usual prim3y coil 8?, secondary coil 83 and core 89. rom the mode with theelectrodes by moons of the flexible cpnductors 90, 90 which connect withthe conductors 91, 91 carried by the electrodes. As the electrodes tendto heat awash-elf when the machine is in operation it is m \-:isah le tokeep a. current of cooling water passing in proximity tothem which mayhedoneby roriding the conductors 9.1, 91 with chem ers 91 and 9}." whichSurround the electrodes and throngh which it current of Waller P s sn ofe emh c, or stwl 91, may be connected with-o source of water re y ba thepi .e 9 nd was be wv i with an outlet 9;. The wa ter circu t may hecompleted by the pipe 9:2 leading into the chamber 91- which is providedwith an outlet 92 The 95%, and 9:2 nm be connected :1 ru her hose 98,which :11 ows for independent motion of the electrodes.

When the welding o rction hnsbeeneomliiik is firmly held by the clampthe bur resulting from the welding operation is reduced, or reipoved. Ths operation is periorn ed y GlQSll'lg upon the bur .two complenicnteryor swgges .94 nd 9 ,111; for or having be ring h l w an t latter a ear gt jaw 97. The swages r :esnec m lymcnntd in emi-cir ular w ge-h ders 3 n9 which re fi ted to os la in sen-mu c nr he ing n the iews as h w, anfimc on y c nsider d. th sin s m'q iotegralputs oi the holders. When theews 9.6 and 97 which ,act assupponts or cap-melts for the smiges areclosed and the swagqs bronght together the two swnge holders constitutea unit swage and may be oscillated as such in the bearing formed by thetwo complementary semicircular m the ions. The swoge holders areproyrded with complementary recessm .so that when they are rought intoco-operation the recess 100 is formed hereby two holders may be rotated-11s a unit on and about a j int in no arc of considerable magnitude. Thejaws are pivotedin such manner as to allow a certain degree of play, thepurpose of which will he hereinafter described and are normallymaintained apart by the tension spring .101 having connections at .102,102. The closing motion of the jaws is timed to brin the swages intoctr-operation unmediutely .t e welding operation has been completed andwhile the link operated upon is being firmly held between the studs.

Each holder is prolided with flanges 103 whereby t. is a ned a ainateral isplgcement on its bearing. 11o prevent the lower holder frombeing dislocated from its hearing when the jaws are open, it may beprovided with half spherical sockets 1&4, 11.1%, which may be adapted totwo hglls 105, 105 (shown in dQtterl lines) which travel along theholfronnd groove 105 (one s n n tted ne located in the nner wall of theflange and concentric with the axis of rotation'o'f the die.

Any suitable means may he provided to efi'ect the proper oscillation ofthe unit swage. These means may consist of the lover or crank arm 106projecting per holder 913 and pivoted art 109 to the link 110, which inturn is pivoted at 111 to the cam lever 112. The com lever is .pivotallyconnected to a. fixed portion of the nechine,

as, for example at 113, and is provided with a; roller 11,4 (shown indotted line); which travels in and is propelled by the petlrca n 115-znonn tcd on the main shaft 15. The cam as shown in the-drawings,particularly in Figure T, l late the swage five strolicsin each cycle ofoperations starting from zero position, (that is, the position shown inigyre 7 and returning thereto. While the oscillation of he s e s goingn, W pr fer to 1 Plem n h ir a t n by e ammer ng pulsating action. Theletter action is secured by the use of the peripheral own 116 ha ng t ththe n as sh r y. "i- Qpcrutive connection with this -.end the few 96 secr d? by t e ol er -L eq ated n the j 9. by m ans f e .edsns ebl ear g ae ta on of th prouces pnlsa mg press re. of h vpper swege 9.4 whi h my rach s ch 1: deco of intensity as to include what mny properly e describd as hammer ng he l ver .6 ay c r y a r ll .9 e s iwi sl to mr o a i lme by t e outer per m e f the hearing carried by the upper joey wherebythe upper hol or is retained at all times in its vbearing.

e can: which o trols t l e 5e 97 is intima ed b he.;= m m .2 nd s shapedso thet the roller 121 which. mounted on the jaw 93 by meensofthcedjustgble ring 122 travels ten or in fir d pos tion axially of thecam while the oscilletion is going ,on, whereby the lower swage acts asan anvil to receive the bio s or pulse.- t-ions' ofthe upper swage.Ellie cams 116 and L20 are formed so that-between two successire burremov ng operations the two complementary swages will he' sufiicientlyretracted from oach'other to permit the adfron; the upis formed nd im dto sci vance of the electrodes and the operation of Q musbolgeptincontnct with the electrodes judgment we mechanism foradvancing85 mencclnent of the next succeeding cycle.

1 welding van the feeding and turning mechanism.

Pon er maybe imported to the machine by any-suitable means such as thepulley 123 mountedon the main shaft.v The clutch 124is alsomounted inthe main shaft and isicontrolled by a. lever 125 the handle of whichlocated in front of the machine so that it will be convenient to thehand of the operator.

It is fr uently and in practice perhaps ienerally e case that theelectrical conuctivity and other electrical properties of variousspecimens of a lot of articles vary to such a. considerable extent thatit is not feasible to apply the current for a uniform period of timefor,al1,-'as is done by the pulley automatic chain iorming machine which wehave hereinbefore described. For instance, 'to consicler- 4,1 chain,slink oilow resistance for a longer; period. than one of high resistancein order that the efieot may be uniform esto all 1i end as the period ofcontact for e giventzl nlacdepends much on human linvedevised themodifications illustrated in higureli: InEigure 15 the period of.contact ohthe electrodes is wholly under the control-oi the o orator,the automstic. .circuit; and the and retracting the electrodes incoordination pith the remaming operating parts, being omitted, othermeans of bringing these purts into operation as desired by the operntor.hemg employed. For

it is convenient to providesnd.lever.126,end. eliminate the circuittiming. deyice,.the circuit hein closed anellfihnes yviththeexceptionott e path betweenthe electrodes. i

As the periods f contaet'with the various linksdifferforthe'reasonsebove stated, it is, of course, desirable thnttheoperating parts of the machine cease motion while the electrodes are incontact nnglfor as long a eriod asis' desired. We therefore provide mounino I ecljorma one revolution clutch 127 of an suitehle. type thcclutch be ng timedyan edjusted to-stop the operetm pertsavhen n link-hasbeen securely locate between the clamp iaws ready for the application,of theelcctrodes and to cause the parts to resume operation 'uponmanipulation. of the hand lerer 128. As one revolw. tion clutches arewell known mechanical devices, we have not deemed it detail: It issufiicient to say necessary to describe them in- 'ablei form for myparticular cplacing of a. link m position tor is completed upon theplacing of the next succeeding-link in position for welding,'the weldingtaking place between the completonofone cycle and the cop);

lowing the course, it is obn'ousthnt we employ a clutch which completesa cycle in one revolution only, merely for the reason that the mainshaft 15 completes a cycle during the same time.

t will also be obvious that even though the electrodes he hnndoperntedthe, one revolution clutch may be entirely omitted, if desired, the camsbeing timed to allow the lin to remain between the clamp jaws for a.period that will be a maximum for all links and suliicient for theproper welding of any links upon which the machine is likely to operate.This construction is not, however; under all circumstances as desirableas that which employs the one revolution clutch since much time mayneedlessly be lost in the welding of those links which, relatively tothe others, are good electrical conductors. I'he operation of themachine shown in Fiiures 1 to 1d inclusive is as follows: ssume that anylink such as the link 126 has been completely operated upon; that is tosay, the free ends have been welded to gcther, the bur removed orreduced, and the complementary dies withdrawn to retracted position. Atthis stage the cruciform dies 17 and 23 are both at the some elevationwith respect to the bed of the machine, thatis, approximately on u levelwith thehorizontnl link 1526. v The movable clamp jaw then retracts andthe chain is elevated to its highest )osit'mn; Before the elevating hasbeen competed the two operations of. rotating the chain and the backwardiced of the fork commence. Be fore the completion of these two motionstho lowering of the chain commences and the chain is brought to itssemi-elevated nosition about the time; of'complotiou of these twomot-ions. The right hand; end of the chain however continues downwardlytill. it engages with the hook. 'l he hook then feeds the chainforwardly :1 distance of one link and. the right hand clcvuthig arm returns to the semi-eleynted osition,- the newly the clamp jaws the as thecircuit is closed;

two free ends of the link togcthen: The electrodes then are retractedand while the link is still heldfirmly by the clamp the sn'agcs ,comeinto operation. when the sn uging has bcencompleted the completed inkis: released from the-ja-wsof the swag. ing mechanism and the same cycleof operations is repeated ably be brought into operation as .soon as theunion of the ends ofthe link isaccomplished. The notion of the sweges isprefer- Immediately fol further movement oi the movable clump takesplace fusing the for each link of the chain. It is intended that theswnges'shnllpfefen.

# vanced ingrcrank a; niovcble hsupportyh wage-provided with ,aconcussworlnngesurface arcualin cross sectiom-stid. swagingrotatablyemounted on Bi'lid six-K1 port and said working surfacebeingsu stantiallyncoaxial with theaxis of rotation of said swa meansI017; advnn f ,and 1136:: 'Qfi gBG-i su'PPQrt .an'dwith itsa-ld swagc toand from o.predetermincd-..position, and means for causingrdtationi-Qfi; said ;swflez m its bear .nvhilesai'dysupportlis inpositmE 1:. di w ins-s in; sun' 12. Inawelding machine,amo., biosIvrage, suppglilk a :swageiprorided givitbi a, concave worgsurfaoearcnahincross section said, swage ing -rototsb1y mounted on'saian 5-: portand sold working suriwerbeing :zsi stantinll coaxial with therilixis of rotation; means rntdvancing; andtretract' isupport-:ondwithitsaid:swageto a iddrom a; predermined position -aradially project-,2 arm on said swage nndimocns operating on saidflarmfor:realising; rotation 0 said swage while said su port is in.advanced'positaon. I m w-1 5 1: it 13. In aiavel machine wpivotedem.

carrying: a rotate 1y monntisd iswagepsaid swage being provided:WifihflsOOIlGBVB: monk-i i -face oronal iii-cross section andeoaixial;with 'i'llBiGiiS-Of rotation of :said wage;- means for swingingsaidpivoted armtonnd from a. predetermmed position! and means for causingrotation of said Tswage-wliiIe said support is advanced ;position-.=-

14. In a welding machine-a pivotedjarm. carrying a rotatably mountedswage,..fsnid: swage being provided (with a i concave working face crowdin cross'section and coaxial with the axis of rotation (if said swn'ge,means for swinging'said pivoted arm tocnd from a predeterminedposition,-.a radially projecting crank arm on said swage, and mainsoperating on the free end: oi said crank armfor causing rotation of,said swage while said arm is in said predator mined osition.

15. a welding machine a. pair ofrmovable supports adopted to move towardand away from each other, each of said supports being provided withbearings in which-ore:

. mounted the. complementary members of .a swage, means for advancing.and retracting said .sllpports -and meansi'for-causing rototion of saidswnge in said bearings while said-s11 port is in advanced position. F

16; a. weld machine, a carrier pro-; vided with a bearing inwhich isrotatably-- mounted a swagze provided with a. concave cylindricalworking surface substantially c axial with the axis of rotation of saidswage,

said cerricrbeing ndapted to advance and retract toand from a.predetermined position,- and means forloausing said swage to rotate insaid bearing while in said prede termined position.

. 17. In a welding macbinenmovsble swagc support provided with a,bearing, a swage rotatably mounted in said: bearing, said swage beingprovided with n'workin'g surface arcual mcro'ss section andsubstantially ooaxialgwith-the .uxisof rotation of said swage, means'forcausing-said support to ndvance tomnd retract from o. predetermined"osition, and-means for causing said swage-l rotate: in-seid bearing-wh1le in said Ip-redetermined- :position. .1 p

18-1 elding-mnchine a movable swage support provided 1!. bearing, aswage rotatably mounted [in said bearing, said svmgev being providedwith aworking surface clonal-in: cross section and substantially coaxialwith the axis-0f rotation of said stage, means-for causingsaidsupportjto advance tmand. retract from a. predetermined-position, :eredia-llv projecting crank arm on said swage, on means actuating s'n-idarm to cause rotation thereof while the seid. =support is in saidpredetermined position. i

19. In a, welding machine means to renew-- ing a part having a.welde'd'joint of arcual GIQESSGCtlOD LB carrier. provided with a hearingin which is rotatably mounted a stage. the working surface of, which isof arcual cross isection-and'cooxial with the axis of rotation .thereof,said carrier being adapted to move to bring said swage into concentricrelation and in contact with said joint. and means fOrrotating-soidswage in its bearing. while thus ositioned.

20. In a wel 'ng machine means for securing a part having a fiveldedjoint of arcual' cross section, a, carrier rovided with a bearing inwhich is rotatab y mounted a swage, the Workingsurface of which is ofarcual crosssection and concentric with the center of rotation thereof,said carrier be ing adapted to move-to bring said swagc into concentricrelation with said joint, 21

' crank arm on said swage, and means actuating said crank arm co-causerotation of said swage while in saidconcentric' relation.

21. In a, welding machine means for securing a port having a. weldedjoint, :1 pair-of swege supports each'o'f which carries a} rotzitablymounted 'swage member, the said members being complementary to eachother means' operating jthrough said suports to close said swag memberson said oint, andjmeans for causing the'nuit swugc to rotate" on andabout said joint while thus closed. l

22. In :iwelding machine memis' for securing-a part'hiiving a. weldedjoint, :1 pair of supports each of which carries a rotatebly mountedswage member, the said members being complementary to each -other means0 crating through said supports to close seic swage members on saidjoint, a crank arm on one of said members; and meane operating throughsaid crank arm to cause the unit sivn'ge to rotate on and about saidjoint while thus closed.

23. In awelclin machine means for seourin a part having a welded joint,:1 pair 0 pirotally mounted jaws each of which carries a rotatablymounted swa-ge member, the said members being complemental-y to eachother, means operating through said jaws to close the swage memhers onsaid joint, and means for causing the unit swagc to rotate about and onSaid joint while thus closed.

24. In a welding 'machine, means for securing a part having a weldedjoint, :1

pair of pivotally mounted jaws each of 'which carries a rotatablymounted swa 0 member, the said members being comp eme'ntury to eachother, means operating through said jaws to close said 'swage membets onsaid joint, a crank arm on said swege, and means operating through saidcrank arm to cause said swage to oscillate on said joint while thusclosed.

25. In a welding machine. means for securing epirt having a weldedjoint, :1 pair of pivoted jaws, a w" member rotat ably mounted in eachof sei jaws, the worksurfaces cl each ofeaid members being in'drioallyconcave and complementary to eizch other, meonsgperating through saidjaws: to close said 5 ego memhers'on 'soid oint, and means for causingthe unit swsge to oscillate about nation said joint while thus closed.

26. In a welding machine, means for securing a p'art having a weldedjoint, a disk ehwped 'swnge compdset lfiof two 60mplementary entolmembers; the workmg surface 0 said members being ooncentrio with saiddisk shepedswuge; a pair of pivoted jaws 8316b havm'g at its :fire'e end'a bearing 'adeptcd to receive "one of Said-memhers whereby the same aremounted to rotate on their gerimeters, radially extended flanges on endmembers whereby laurel-e1 play of the some in their is peevented, meansfor cloning 's'eid jews lmd consequently said wu e memlms on 1; joint to"Be swege mcrrnk on one-orseid members, a. roller on said crank am cg;operating with a cireulhrjtrack concentric with said whereby theseidmmber is ppeveneedfi-om rudielly from its heerin'gs, means operatingthrough said crank arm to impart oscillatory motion to said swugeuhenthe Said members nrein cooperative *r'e'littion, =21 ball socket in theinner face ofbhe drihe flhnges of the=other of said membels, acooperating bull race in the adjacent side of the jaw in which the saidmember is mounted, a ball seated in said socket whereby said member isprevented from being dislocated from its bearlugs, and means for causingsaid jaws and consequently said swage members to close upon said jointand to be withdrawn therefrom.

27. In a welding machine, means for securing :1 port to be welded, apairof op poring swage membels together forming "a unit swage, means forclosing said swagc members on a joint to be swagecl, and means forimparting oscillatory motion to said swage on and about said joint whilethus closed thereon.

28. In ewelcling machine, a unit swoge composed of two complementarymembers the sweging surface being composed of registering recesses ineach of said members, a hearing for said six-ago whereby the some isadapted to rotate about a joint to e ewaged, a crank arm on one of saidmembers and means operating through said crank arm to cause rotation ofsaid swoge.

29. In a. welding machine, means for so curing a chain link againstmovement, a pair of segmental swage members having registering swagingsurfaces in the chordal portions 'of their perimeter-s, the said swagmgsurfaces being tunnel in cross-section and having-u common center andalso eccentrically located cut-hway portions in the chordal section ofthe perimeter of one of said members, a pair of pivoted 'aws, in each ofwhich is rotatably mounts one of said swage members, said jaws havingshanks, cams cooperating with said shanks to close said j'awe'anclconsequently said members on a joint to he swa'ged, the camming surfacesof said cams being provided with Small elevations adapted to alternatelyincrease 11ml decrease the pressure of said swt'ge members on saidjoint: a crank arm on one of said members, a. connected with shit! crankarm, and means operating through-said link to import oscillatory motionto said 'swngo while thus closed on said 'oint.

l 30. In a welding machine. means for seouring a chain link againstmovement, :1 pair of segmental swa ge members having registering wagingsm'fh'ces in the chordal portions of their perlmeters. the said sung-111% sm jf oces be ng a-rcuarl In cross-section an having a commoncenter End also ecoeiltiicelly located cutaway portions in chordalportion of the perimeter of one of said nee-ite a pair of piratedjaws,ii1 each ()Fi vhi'ch is ro'tat'sibly mounted one of said sto agemembers said jaws having shanks; cams cooperating with said shanks toclose said jaws and consequently said members on a. joint to b'e-swaged.the cumming surfaces of said cams being provided with small clevationsadapted to alternatelp increase and decrease the pressure of suit swagemem bers on said joint,,and means for causing oscillatory motion of theunit swage while thus closed on a joint.

31. In a welding machine, curing pair of means for sea chain linkagainst movement, a

segmental swaps members havin g swaging sur aces in the chords portionsof thelrperimeters, the said swaglugd surfaces being arcual incross-section an having a common center and also eccentrically locatedcut-away portions, in the chordal portion of the perimeter of one ofsaid members, a pair of pivoted jaws in each of which is rotatablmounted one oi said swage members sai jaws having shanks, camsco-operating with said shanks to close said jaws and couse uently saidmembers on a joint to be swage the cumming surfaces of said cams beingprovided withsmall elevetions adapted to alternately increase anddecrease the pressure of said swage members on said joint.

'32. In a welding machine, a rotatably mounted swage composed of two somental sections complementary to each'ot er and having the swagingsurface concentric with the unit swage, a movable suppprt for each ofsaid members and in which t a said mem bers are rotatably mounted, meansfor clos-v ing said supports and consequently said swaging sur see on ajo' t. to be welded whereby, pressure is applied to said joint andmeansfor'imparting a.v succession oi pulsations .to said pressure.

38. I'u a welding machine, a. rotatahl mounted swagle composed oitwofsegmen sections com ementaryjtopach other, and theswagingjsurfaceconcentric ,with the ,nnit swa'ge, amorablsupport foreach of said members a'nd in'which the "said members areIrotatably'rnounted, meansfor closing said snpportsandconsequentlysaidswaging surfaces on a joint, means ionimpartmg a succession ofpulsationsjto said pressure, and means acting similltaneously withsaidpressure for-causing thesaid swage to re- "te ass unit in th hearings 1nsaid suports. P 34. In a welding machine, means for 'securing. a arthaving awclded joint, 9. pair of ino'vab e, swage supports, eachcarrying one of thecom lementary members of .a unit swage, sai membersbeing rotatably mounted in the supportsby which they are respectivelycarried, means. actuating said supports to cause said sWagemembers toclose on a joint to be swaged, themeans for actuat' oneof said supportscomprising a cam an intermediate connections thesaid cam-havinga-succ'ession or. relatively small elevations so positioned as to imparta pulf satin action to the'vpire'ssure of the swage mom er carried by esupport last mentioned, and means for causing Said unit swage to rotateon and about said joint during the application of said pressure.

35. In a welding machine, means for securing a part having a weldedjoint, a pair of movab e swage supports, eachcarrying one of the comlenientary members of a unit swage, sair members being rotatably mountedm respectively carried and turning and rotating on a common center,means actuating said supports to cause said swa e members to close on ajoint to be swaged, t e said means also embracing means for causing apulsatiug pressure on said joint. 7

36. In a weldin machine, a pair of clam jaws adapted to c ose on theends of a roun wire chain link having a welded joint, a swage of discform composed of two complementary segmental members, the workingsurfaces of said members be'm arcual in cross-section but of less than ahalf circle and together forming a concave substantially cylindricul swaing surface co-axial with the unit swage, the chordal edges of saidsegmental members bein provided with eccentrically positionedregistering recesses, a pair of resiliently pivoted jaws provided withshanks, each jaw having at lts free end a bearing ada ted to receive oneof said segmentalmem ers and wherein the same are mounted to rotate ontheir arcual erimeters, radially cxtendin flanges on sai members wherebylateral play in the hearings is prevented, a'crank arm on one of saidmembers, a circular track on the jaw carrying said member, said trackbeing concentric with the bearing therein, a roller on said crank armpositioned to travel on said track asthe said member is rotated in itsbearing, means actuating said crank arm to produce oscillatory motion'ofsaid swage when said members are'closed on a link joint, ball sockets onthe inner walls of-the flanges of the other of the said members,co-operating ball races in the adjacent sides of the-jaw carrying saidmember, a hall caged in 'said'socket, cams actuating said shanks tocause Said'jaws and with them said swage members to closeatperiodicintervals, 'on a joi'ntjto' be welded, one of said cams bein providedwithsuccession of relatively'smal elevations adapted tocome into 0oration when said jaws are thus closed w ereby the ressure of theswaging members of said oint is accompanied by a succession ofpulsations.

37. Ina chain welding maclnne a clamp comprising a stationary aw and amovable jaw, a pair of independently slidable electrodes, a swagingmechanism comprising a pair of jaws each of which carries one of a pairof compl! entary swagcseach of said swa cs being retained by a swageholder r0- tata lymounted in one of said jaws, a pair of chain elevatingarms carrying horizonthe supports by which they are.

lli)

and;

tally alinod and rotatably mounted cruci form dies, :1 slidabl' mountedvertically disposed fork ada bed to engage a section of chain, means or"advanc ng said movable jaw to clamp a link in fired position againstsaid stationary jaw and for pressing the free ends'together m abutment,means for advanc' seid electrodes to close a. circuit thro A theconnection thus formed, means for n lfnrther pressing said ends togetherwhen the same have been heated by :1. mm rent passed through them, themeans for closing said swages on the weld and imparting to one of'them ahammering action, means for oscillating said mo es on said weldsimuitsneously with said 'iarmnering action, means for elevating andlowering said chain, meow for rotatin said chain in an arc of 90 degreesalternatliy in one direction and than in soothe -and means forretracting said fork while said chain is elevoted, and advancing it whenone of smd dies is in lowered pos tion.

38. In a welding machine a clam ompr s ng a s ationary a a mpr e 'iii'fa a of i flepe'ne t y nd s a y l ed el smdes. f r advancing an mo eso se -Do to d se a. circuit throng the abutting free ends of an un edsd held by a da p pa oi ja s Whig otet b y mounted mplepgeutaxw" swegeholders in Which are mounted ,a. air'of complementary swa for said ewe.on a. moi of a W ile t e i he y e amp, for osgllietin said swe e holdershbn the en re 9 ro a o lo d on a w ld, e. P of their lmgtmg a p rryqtatehy an ed n qrm d p normal y .f ms? h s s ain senile hron seldmnsfip sle en'g s id eru i rm ou of almme h aid lan, n r owe ng them, no s immes .s ew a f e- V pne of said dies out of alinement wi. $3 13 cie; a f rk mi s t e gage in o wi car i d y d 1 Qr c h n. t e 1 s men i nie s n der s s sifism, id f being m un e on. a ride to e r i ge adap d op w i e l re .of fe .o sa h in, e ns or causing said carriage to retractwhile said chain is, above its depressed position 16 advance a distanceof one link when said chain is in depressed position and in engagn entwith said hook, and means for wa king said cruciform dies synchromeshore of. ni e y degrees i o rection during one cycle of operations of saidin f e an in an arc of ninety degoes in an :fpmite direction during thesucceeding cy e'of ogerat ons.

3,9. In fan electric c sin welding manhiue, a chain feed andigaositioning mechanism comprising a pair 0 pivoted arms carrying attheir free ends rotatably mounted dies in alincment with each other,crank arms on exp-id dies, link clamp jaws intermediate said dies, camsoperating on said arms to cause said dies to remain for a predator minedperiod in alinement with said clamp jaws, then to elevate the said freeends, then to lower them to said sition of a'linement then to do ressone 0 said arms below said position 0 nlinemcnt and then to return it tosaid position of alinement, e *slidably mounted chain feed fork adaptedto reci rocate in nlinement with a chain currie by said dies when thelast mentioned arm is in depressed position, means operating throughsold crank arms to cause said dies to rotate through a predetermined arealternately in opposite direction with successive elevations of'ssidarms, and means for causing said clamp jaws to close on a when said diesare in said o sition of alinement and to secure said lmk during saidpredetermined eriod.

40. n on electric chain welding msehine a cl gin feed mechanismincluding a ivoted m ha ng ts e end bim .e' ind eing Pr vided th bearngs, 1111 d es mou ted i l beer es pmtin'g n sa to i se nd o e said angs, a d c a n g emlins d fie u e v'feeip e 1 4 ith said dies, and 1nalinement with them when they are in lowered ositiqn.

In a e r c in weld mse ine c n feed heni'sslz slud ns *4 hotel rm ha g s.free en nteres d. e

ined i es, m n ope eting an sa o raise an .o erlflfs i s, and a soshing. one r p 1 o resigned? ra sins he no a in a 2.- n in som thaniwefiias'mis re st in eedi g Jami 91fi g meshenis i elu ii g 1 e. 'se-' P l it ree end h in ce eq, the te mi als be ng P ded with bee -les itently mo n d in .53 6. bser ngs and 'in fis eme t i h 52 o her; rasnsii ne atingj r' aid arm to raise and lower said dies, a grabb g de i munt d to r rsz n e tween 3 1. l st n in e ie l n th hem when they are ina. predetermined position, and means for rotating said dies through agredeterrnined angle in alternation with the e in m e of aid gra in' dise- 43. an electric chain welding machine a. chain eeding andpositioning mechanism which includes a. piroted arin having its free endbifurcated, the terminsls being pro vided with e r n .c die mounte aidbearings and nilnement with each other, means op rat ng t g i to a!-ternately raise "and lower said bearings a chain grabbing hook mountedto rc'clpro for cote between said dies and in nlinement with them whenthey are in lowered position, a link clamping device adapted to secure alink when said dies are in semi-elevated position, and means adapted tocause said dies to rotate alternately in one direction and then in theother, during successive elevated positions of said dies.

44. In an electric chain welding machine, a chain feedin and positioningmeans comprising a slicfahly mounted grab hook a pair of spaced alinedchain securing dies, supports. for said dies, means 0 crating on saidsupports to advance said ies to a position of alinement with the motionof said hook and to retract them from said position.

45. In an electric chain welding machine, a chain feedin and positioningmeans comprising a slidahly mounted grab hook a pair of spaced alinedchain securing dies, supports for said dies, means operating on saidsupports to advance said dies to a position of alinement with the motionof said hook and to retract them from said position, means for causingsaid hook to reciprocate and link clamping means adapted to close on alink while said dies are not in said position of alinement.

46. In an electric chain welding machine, a chain t'eedin andpositioning means comprising a $11 ably mounted grab hook a pair ofspaced alined chain securing dies,

supports for said dies, means operating on said supports to advance saiddies to a position of alinement with the motion of said hook and toretract them from said position, means for causing said hook toreciprocate and link clamping means adapted to close on a link whilesaid dies are not in said position of alinement, and means for causingsaid dies to rotate first in one direction and then in the other througha predetermined angle alternately during predetermined periods.

47. In an electric chain welding machine, a chain feeding andpositioning means com prising a slidably mounted grab hook. a pair ofspaced alincd chain securing dies, supports for said dies, means ofoperating on said supports to advance said dies to a position ofalinement with the motion of said hook and to retract them from saidposition; means for causing said hook to reciproute, and means forcausing said dies to rotate first in one direction and then in the otherthrough a predetermined angle alternately during predetermined periods;and link clamping means adapted to close on a link while said dies arenot in said position of alinement.

In testimony whereof, we have signed this specification.

CARLTON L, HOFF. GIRARDUS G. NAUGLE.

